The Allnet SATA HAT Quad NAS Raspberry Pi® add-on PCB is manufactured by Allnet and is compatible with Raspberry Pi® development kits. This add-on PCB enables the integration of up to four SATA hard drives, transforming a Raspberry Pi® into a reliable network-attached storage (NAS) solution. It is ideal for projects requiring large-scale data storage and retrieval, making it suitable for home media servers and small office setups.